RT Journal Article SR Electronic T1 Multiple sclerosis causing a partial sixth nerve palsy JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr2013201239 DO 10.1136/bcr-2013-201239 VO 2014 A1 Kinan Muhammed A1 Joanna Ball YR 2014 UL http://casereports.bmj.com/content/2014/bcr-2013-201239.abstract AB